| Message ID | 20240128115953.25085-1-alexghiti@rivosinc.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | riscv: Implement pte_accessible() | expand |
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index 0c94260b5d0c..3b46677827f6 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -353,6 +353,19 @@ static inline int pte_present(pte_t pte) return (pte_val(pte) & (_PAGE_PRESENT | _PAGE_PROT_NONE)); } +#define pte_accessible pte_accessible +static inline unsigned long pte_accessible(struct mm_struct *mm, pte_t a) +{ + if (pte_val(a) & _PAGE_PRESENT) + return true; + + if ((pte_val(a) & _PAGE_PROT_NONE) && + atomic_read(&mm->tlb_flush_pending)) + return true; + + return false; +} + static inline int pte_none(pte_t pte) { return (pte_val(pte) == 0);
Like other architectures, a pte is accessible if it is present or if there is a pending tlb flush and the pte is protnone (which could be the case when a pte is downgraded to protnone before a flush tlb is executed). Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com> --- arch/riscv/include/asm/pgtable.h | 13 +++++++++++++ 1 file changed, 13 insertions(+)